Comparison of Long-Term Healthcare Cost and Utilisation of Nonoperative and Surgical Management of Thumb CMC Arthritis.

Background: Thumb carpometacarpal joint (CMC) osteoarthritis is the most symptomatic hand arthritis but the long-term healthcare burden for managing this condition is unknown. We sought to compare total healthcare cost and utilisation for operative and nonoperative treatments of thumb CMC arthritis. Methods: We conducted a retrospective longitudinal analysis using a large nationwide insurance claims database. A total of 18,705 patients underwent CMC arthroplasty (trapeziectomy with or without ligament reconstruction tendon interposition) or steroid injections between 1 October 2015 and 31 December 2018. Primary outcomes, healthcare utilisation and costs were measured from 1 year pre-intervention to 3 years post-intervention. Generalised linear mixed effect models adjusted for potentially confounding factors such as the Elixhauser comorbidity score with propensity score matching were applied to evaluate the association between the primary outcomes and treatment type. Results: A total of 13,646 patients underwent treatment through steroid injections, and 5,059 patients underwent CMC arthroplasty. At 1 year preoperatively, the surgery group required $635 more healthcare costs (95% CI [594.28, 675.27]; p < 0.001) and consumed 42% more healthcare utilisation (95% CI [1.38, 1.46]; p < 0.0001) than the steroid injection group. At 3 years postoperatively, the surgery group required $846 less healthcare costs (95% CI [-883.07, -808.51], p < 0.0001) and had 51% less utilisation (95% CI [0.49, 0.53]; p < 0.0001) annually. Cumulatively over 3 years, the surgical group on average was $4,204 costlier than its counterpart secondary to surgical costs. Conclusions: CMC arthritis treatment incurs high healthcare cost and utilisation independent of other medical comorbidities. At 3 years postoperatively, the annual healthcare cost and utilisation for surgical patients were less than those for patients who underwent conservative management, but this difference was insufficient to offset the initial surgical cost. Level of Evidence: Level III (Therapeutic).

Hospital resource use after hip reconstruction surgery in children with neurological complex chronic conditions.

AIM: To assess how co-occurring conditions influence recovery after hip reconstruction surgery in children with neurological complex chronic conditions (CCCs). METHOD: This was a retrospective analysis of 4058 children age 4 years or older with neurological CCCs who underwent hip reconstructive surgery between 1st January 2015 and 31st December 2018 in 49 children's hospitals. The presence of co-occurring chronic conditions was assessed using the Agency for Healthcare Research Chronic Condition Indicator system. Multivariable, hierarchical regression was used to assess the relationship between co-existing conditions and postoperative hospital length of stay (LOS), cost, and 30-day readmission rate. RESULTS: The most common co-occurring conditions were digestive (60.1%) and respiratory (37.9%). As the number of co-existing conditions increased from one to four or more, median LOS increased 67% (3d [interquartile range {IQR} 2-4d] to 5d [IQR 3-8d]); median hospital cost increased 41% ($20 248 [IQR $14 921-$27 842] to $28 692 [IQR $19 236-$45 887]); and readmission rates increased 250% (5.5-13.9%), p<0.001 for all. Of all specific co-existing chronic conditions, malnutrition was associated with the greatest increase in postoperative hospital resource use. INTERPRETATION: Co-occurring conditions, and malnutrition in particular, are a significant risk factor for prolonged, in-hospital recovery after hip reconstruction surgery in children with a neurological CCC. Further investigation is necessary to assess how improved preoperative optimization of multiple co-occurring conditions may improve postoperative outcomes and resource utilization. WHAT THIS PAPER ADDS: Children with neurological complex chronic conditions (CCCs) often develop hip disorders which require hip reconstruction surgery. Co-occurring conditions are common in children with neuromuscular CCCs. Having four or more chronic conditions was associated with a longer length of stay, increased costs, and higher odds of readmission. Malnutrition was a significant risk factor for prolonged hospitalization after hip reconstruction surgery.

Value of Cervical Disk Arthroplasty.

Over the last decade, several of the Food and Drug Administration-regulated investigational device exemption (IDE) trials have compared multiple cervical disk arthroplasty (CDA) devices to anterior cervical decompression and fusion (ACDF) showing comparable and even superior patient-reported outcomes. CDA has been an increasingly attractive option because of the positive outcomes and the motion-preserving technology. However, with the large burden that health care expenditures place on the economy, the focus is now on the value of treatment options. Cost-effectiveness studies assess value by evaluating both outcomes and cost, and recently several have been conducted comparing CDA and ACDF. The results have consistently shown that CDA is a cost-effective alternative, however, in comparison to ACDF the results remain inconclusive. The lack of incorporation of disease specific measures into health state utility values, the inconsistent methods of calculating cost, and the fact that a vast majority of the results have come from industry-sponsored studies makes it difficult to form a definitive conclusion. Despite these limitations, both procedures have proven to be safe, effective, and cost-efficient alternatives.

Comparative cost-effectiveness analysis of the subacromial spacer for irreparable and massive rotator cuff tears.

PURPOSE: There is ongoing debate regarding the optimal surgical treatment of irreparable rotator cuff tears (IRCT). This study aimed to assess within the Italian health care system the cost-effectiveness of subacromial spacer as a treatment modality for patients with IRCT. METHODS: An expected-value decision analysis was created comparing costs and outcomes of patients undergoing arthroscopic subacromial spacer implantation, rotator cuff repair (RCR), total shoulder arthroplasty, and conservative treatment for IRCTs. A broad literature search provided input data to extrapolate and inform treatment success and failure rates, costs, and health utility states for these outcomes. The primary outcome assessed was an incremental cost-effectiveness ratio (ICER) of subacromial spacer implantation versus shoulder arthroplasty, RCR, and conservative treatment. RESULTS: Subacromial spacer is favorable over both arthroscopic partial repair and shoulder arthroplasty since it costs less than both options and increases effectiveness by 0.06 and 0.10 quality-adjusted life years (QALYs), respectively. While conservative treatment is the least costly management strategy, subacromial spacer results in a gain of 0.05 QALYs for the additional cost of 522 €, resulting in an ICER of 10,440 €/QALY gain, which is below the standard willingness to pay ratio of $50,000 USD. Strategies with an ICER of less than 50,000 USD are considered to be cost-effective. CONCLUSIONS: Based on the available evidence and reasonably conservative assumptions, subacromial spacer is likely to provide a safe, effective, and cost-effective option for patients with massive IRCTs. Furthermore, this cost-effectiveness analysis may ultimately serve as a guide for development of health care system and insurer policy as well as clinical practice.

Shoulder arthroplasty volume standards: the more the better?

INTRODUCTION: The wide use of hip and knee arthroplasty has led to implementation of volume standards for hospitals and surgeons. For shoulder arthroplasty, the effect of volume on outcome has been researched, but no volume standard exists. This review assessed literature reporting on shoulder arthroplasty volumes and its relation to patient-reported and functional outcomes to define an annual volume threshold. MATERIALS AND METHODS: MEDLINE and EMBASE were searched for articles published until February 2018 reporting on the outcome of primary shoulder arthroplasty in relation to surgeon or hospital volume. The primary outcome was predefined as any patient-reported outcome. The secondary outcome measures were length of stay, costs, rates of mortality, complications, readmissions, and revisions. A meta-analysis was performed for outcomes reported by two or more studies. RESULTS: Eight retrospective studies were included and did not consistently show any associations of volume with in-hospital complications, revision, discharge to home or cost. Volume was consistently associated with length of stay (shorter length of stay for higher volume) and in-hospital complications (fewer in-hospital complications for higher volume). It was not consistently associated with mortality. Functional outcomes were not reported. CONCLUSIONS: There is insufficient evidence to support the concept that only the number of shoulder arthroplasties annually performed (either per hospital or per surgeon) results in better patient-reported and functional outcomes. Currently, published volume thresholds are only based on short-term parameters such as length and cost of hospital stay.

The Association Between Provider Price and Complication Rates for Outpatient Surgical Services.

BACKGROUND: Wide variations exist in price and quality for health-care services, but the link between price and quality remains uncertain. OBJECTIVE: This paper used claims data from a large commercially insured population to assess the association between both procedure- and provider-level prices and complication rates for three common outpatient surgical services. DESIGN: This is a retrospective cohort study. SETTING: The study used medical claims data from commercial health plans between 2009 and 2013 for three outpatient surgical services-joint arthroscopy, cataract surgery, and colonoscopy. MAIN MEASURES: For each procedure, price was assessed as the sum of patient, employer, and insurer spending. Complications were identified using existing algorithms specific to each service. Multivariate regressions were used to risk-adjust prices and complication rates. Provider-level price and complication rates were compared by calculating standardized differences that compared provider risk-adjusted price and complication rates with other providers within the same geographic market. The association between provider-level risk-adjusted price and complication rates was estimated using a linear regression. KEY RESULTS: Across the three services, there was an inverse association between both procedure- and provider-level prices and complication rates. For joint arthroscopy, cataract surgery, and colonoscopy, a one standard deviation increase in procedure-level price was associated with 1.06 (95% CI 1.05-1.08), 1.14 (95% CI 1.11-1.16), and 1.07 (95% CI 1.06-1.07) odds increases in the rate of procedural complications, respectively. A one standard deviation increase in risk-adjusted provider price was associated with 0.09 (95% CI 0.07 to 0.11), 0.02 (95% CI 0.003 to 0.05), and 0.32 (95% CI 0.29 to 0.34) standard deviation increases in the rate of provider risk-adjusted complication rates, respectively. LIMITATIONS: Results may be due to unobserved factors. Only three surgical services were examined, and the results may not generalize to other services and procedures. Quality measurements did not include patient satisfaction or experience measures. CONCLUSIONS: For three common outpatient surgical services, procedure- and provider-level prices are associated with modest increased rates of complication rates.

Robotics in Orthopedics: A Brave New World.

Future health-care projection projects a significant growth in population by 2020. Health care has seen an exponential growth in technology to address the growing population with the decreasing number of physicians and health-care workers. Robotics in health care has been introduced to address this growing need. Early adoption of robotics was limited because of the limited application of the technology, the cumbersome nature of the equipment, and technical complications. A continued improvement in efficacy, adaptability, and cost reduction has stimulated increased interest in robotic-assisted surgery. The evolution in orthopedic surgery has allowed for advanced surgical planning, precision robotic machining of bone, improved implant-bone contact, optimization of implant placement, and optimization of the mechanical alignment. The potential benefits of robotic surgery include improved surgical work flow, improvements in efficacy and reduction in surgical time. Robotic-assisted surgery will continue to evolve in the orthopedic field.

Trends in resource utilization and rate of cervical disc arthroplasty and anterior cervical discectomy and fusion throughout the United States from 2006 to 2013.

BACKGROUND CONTEXT: The typically accepted surgical procedure for cervical disc pathology has been the anterior cervical discectomy and fusion (ACDF), although recent trials have demonstrated equivalent or improved outcomes with cervical disc arthroplasty (CDA). Trends for these two procedures regarding utilization, revision procedures, and other demographic information have not been sufficiently explored. PURPOSE: The present study aims to provide data regarding ACDF and CDA from 2006 to 2013 in the United States. DESIGN: The present study is a retrospective national database analysis. PATIENT SAMPLE: The present study included 20% sample of discharges from US hospitals, which is weighted to provide national estimates. OUTCOME MEASURES: Functional measures such as national incidence, hospital costs, length of stay (LOS), routine discharge, revision burden, and patient characteristics were used in the present study. METHODS: Patients from the National Inpatient Sample (NIS) database who underwent primary ACDF, revision ACDF, primary CDA, and revision CDA from 2006 to 2013 were included. Demographic and economic data for the procedures' respective International Classification of Diseases, Ninth Revision, Clinical Modification codes were collected. RESULTS: A total of 1,059,403 ACDF and 13,099 CDA surgeries were performed in the United States from 2006 to 2013. The annual number of ACDF increased by 5.7% nonlinearly from 120,617 in 2006 to 127,500 in 2013 (mean per year 132,425; range 120,617-147,966); CDA increased by 190% nonlinearly from 540 in 2006 to 1,565 in 2013 (mean per year 1,637; range 540-2,381). Cervical disc arthroplasty patients were younger and had more private or "other" insurance, including worker's compensation (p<.0001). Mean LOS was longer for ACDF (ACDF 2.3 days vs. CDA 1.5; p<.0001). Routine discharge was higher in the CDA group (CDA 96% vs. ACDF 89%; p-value<.0001). The mean hospital-related cost was more expensive for ACDF (ACDF $16,178 vs. CDA $13,197; p-value=.0007). Cervical disc arthroplasty mean revision burden, defined as the ratio of revision procedures to the sum of primary and revision procedures, was greater (CDA 5.9% vs. ACDF 2.3%, p-value=.01). CONCLUSIONS: Nationally approximately 132,000 ACDFs are done each year compared with only 1,600 CDAs. The number of ACDF surgeries performed far outpaces CDA by a ratio of 81:1 in the United States without a clear direction in the trend for utilization given recent fluctuations. Cervical disc arthroplasty revision burden was more than double compared with the ACDF revision burden (5.9% vs. 2.3%), which was not accounted for by patient baseline demographics. The etiologies of these findings are likely multifactorial and require further research.

Early Lessons on Bundled Payment at an Academic Medical Center.

INTRODUCTION: Orthopaedic care is shifting to alternative payment models. We examined whether New York University Langone Medical Center achieved savings under the Centers for Medicare and Medicaid Services Bundled Payments for Care Improvement initiative. METHODS: This study was a difference-in-differences study of Medicare fee-for-service patients hospitalized from April 2011 to June 2012 and October 2013 to December 2014 for lower extremity joint arthroplasty, cardiac valve procedures, or spine surgery (intervention groups), or for congestive heart failure, major bowel procedures, medical peripheral vascular disorders, medical noninfectious orthopaedic care, or stroke (control group). We examined total episode costs and costs by service category. RESULTS: We included 2,940 intervention episodes and 1,474 control episodes. Relative to the trend in the control group, lower extremity joint arthroplasty episodes achieved the greatest savings: adjusted average episode cost during the intervention period decreased by $3,017 (95% confidence interval [CI], -$6,066 to $31). For cardiac procedures, the adjusted average episode cost decreased by $2,999 (95% CI, -$8,103 to $2,105), and for spinal fusion, it increased by $8,291 (95% CI, $2,879 to $13,703). Savings were driven predominantly by shifting postdischarge care from inpatient rehabilitation facilities to home. Spinal fusion index admission costs increased because of changes in surgical technique. DISCUSSION: Under bundled payment, New York University Langone Medical Center decreased total episode costs in patients undergoing lower extremity joint arthroplasty. For patients undergoing cardiac valve procedures, evidence of savings was not as strong, and for patients undergoing spinal fusion, total episode costs increased. For all three conditions, the proportion of patients referred to inpatient rehabilitation facilities upon discharge decreased. These changes were not associated with an increase in index hospital length of stay or readmission rate. CONCLUSION: Opportunities for savings under bundled payment may be greater for lower extremity joint arthroplasty than for other conditions.

Subscapularis- and deltoid-sparing vs traditional deltopectoral approach in reverse shoulder arthroplasty: a prospective case-control study.

BACKGROUND: With the growth of reverse shoulder arthroplasty (RSA), it is becoming increasingly necessary to establish the most cost-effective methods for the procedure. The surgical approach is one factor that may influence the cost and outcome of RSA. The purpose of this study was to compare the clinical results of a subscapularis- and deltoid-sparing (SSCS) approach to a traditional deltopectoral (TDP) approach for RSA. The hypothesis was that the SSCS approach would be associated with decreased length of stay (LOS), equal complication rate, and better short-term outcomes compared to the TDP approach. METHODS: A prospective evaluation was performed on patients undergoing RSA over a 2-year period. A deltopectoral incision was used followed by either an SSCS approach or a traditional tenotomy of the subscapularis (TDP). LOS, adverse events, physical therapy utilization, and patient satisfaction were collected in the 12 months following RSA. RESULTS: LOS was shorter with the SSCS approach compared to the TDP approach (from 8.2 ± 6.4 days to 15.2 ± 11.9 days; P = 0.04). At 3 months postoperative, the single assessment numeric evaluation score (80 ± 11% vs 70 ± 6%; P = 0.04) and active elevation (130 ± 22° vs 109 ± 24°; P = 0.01) were higher in the SSCS group. The SSCS approach resulted in a net cost savings of $5900 per patient. Postoperative physical therapy, pain levels, and patient satisfaction were comparable in both groups. No immediate intraoperative complications were noted. CONCLUSION: Using a SSCS approach is an option for patients requiring RSA. Overall LOS is minimized compared to a TDP approach with subscapularis tenotomy. The SSCS approach may provide substantial healthcare cost savings, without increasing complication rate or decreasing patient satisfaction.

Total Joint Arthroplasty Patients' Education on Financial Issues and Its Connection to Reported Out-of-Pocket Costs-A European Study.

PURPOSE: Total joint arthroplasty is accompanied by significant costs. In nursing, patient education on financial issues is considered important. Our purpose was to examine the possible association between the arthroplasty patients' financial knowledge and their out-of-pocket costs. METHODS: Descriptive correlational study in five European countries. Patient data were collected preoperatively and at 6 months postoperatively, with structured, self-administered instruments, regarding their expected and received financial knowledge and out-of-pocket costs. FINDINGS: There were 1,288 patients preoperatively, and 352 at 6 months. Patients' financial knowledge expectations were higher than knowledge received. Patients with high financial knowledge expectations and lack of fulfillment of these expectations had lowest costs. CONCLUSION: There is need to establish programs for improving the financial knowledge of patients. Patients with fulfilled expectations reported higher costs and may have followed and reported their costs in a more precise way. In the future, this association needs multimethod research.

Bundled Payments: Our Experience at an Academic Medical Center.

BACKGROUND: The landscape of health care is transitioning from a fee-for-service model to value-based purchasing. METHODS: We developed evidence-based clinical pathways and risk stratification measures to effectively implement the Bundled Payments for Care Improvement model of value-based purchasing. RESULTS: We decreased patients' length of stay, discharge to inpatient facilities, and cost of an episode of patient care. CONCLUSION: The bundled care payment initiative has been successfully implemented for Diagnosis Related Groups 469 and 470, delivering high-quality patient care at a reduced price.

A 5-Year Cost-Effectiveness Analysis of Silicone Metacarpophalangeal Arthroplasty in Patients with Rheumatoid Arthritis.

BACKGROUND: There is a paucity of research evaluating the cost-effectiveness of surgical interventions for rheumatoid arthritis patients. Previous reports have challenged the sustainability of improved outcomes after silicone metacarpophalangeal arthroplasty. The authors conducted an economic evaluation of the long-term health outcomes after silicone metacarpophalangeal arthroplasty. METHODS: The authors performed a 5-year prospective cohort study of 170 patients with rheumatoid arthritis (73 surgical and 97 nonsurgical). Objective functional measurements and patient-rated outcomes using the Michigan Hand Outcomes Questionnaire and the Arthritis Impact Measurement Scale 2 were collected at 3 and 5 years. A cost-effectiveness analysis using direct costs from Medicare outpatient claims data (2006 to 2010) was performed to estimate the incremental cost-effectiveness ratios for both the Michigan and Arthritis Impact Measurement Scale 2 measurements. RESULTS: At 5 years, the authors observed a statistically significant difference in upper extremity outcomes (Michigan Hand Outcomes Questionnaire) between the two groups, with surgical patients having higher outcomes. Costs associated with improved outcomes 5 years after surgery were $787 to $1150 when measured by the Michigan Hand Outcomes Questionnaire and $49,843 to $149,530 when measured by the Arthritis Impact scale. The incremental cost-effectiveness ratios did not substantially increase with their observed surgical revision rate of 5.5 percent (approximately 4 percent increase in incremental cost-effectiveness ratio) or with previously published long-term revision rates of 6.2 percent (approximately 6 percent increase in incremental cost-effectiveness ratio). CONCLUSIONS: Short-term improvements in upper extremity outcomes after silicone metacarpophalangeal arthroplasty are maintained over the 5-year follow-up period. These outcomes are achieved at a relatively low cost, even with the addition of potential surgical complications.

Variation in rheumatoid hand and wrist surgery among medicare beneficiaries: a population-based cohort study.

OBJECTIVE: To examine the rate and variation in rheumatoid arthritis (RA)-related hand and wrist surgery among Medicare (elderly) beneficiaries in the United States, and to identify the patient and provider factors that influence surgical rates. METHODS: Using the 2006-2010 100% Medicare claims data of beneficiaries with RA diagnosis, we examined rates of rheumatoid hand and wrist arthroplasty, arthrodesis, and hand tendon reconstruction in the United States. We used multivariate logistic regression models to examine variation in receipt of surgery by patient and regional characteristics (density of providers, intensity of use of biologic disease-modifying antirheumatic drugs). RESULTS: Between 2006 and 2010, the annual rate of RA-related hand and wrist arthroplasty or arthrodesis was 23.1 per 10,000 patients, and the annual rate of hand tendon reconstruction was 4.2 per 10,000 patients. The rates of surgery varied 9-fold across hospital referral regions in the United States. Younger patient age, female sex, white race, higher socioeconomic status (SES), and rural residence were associated with a higher likelihood of undergoing arthroplasty and arthrodesis. We observed a significant decline in rate of arthroplasty and arthrodesis with increasing density of rheumatologists. Tendon reconstruction was not influenced by provider factors, but was correlated with age, race, SES, and rural status of the patients. CONCLUSION: Surgical reconstruction of rheumatoid hand deformities varies widely across the United States, driven by both regional availability of subspecialty care in rheumatology and individual patient factors.

Surgery for hip fracture yields societal benefits that exceed the direct medical costs.

BACKGROUND: A hip fracture is a debilitating condition that consumes significant resources in the United States. Surgical treatment of hip fractures can achieve better survival and functional outcomes than nonoperative treatment, but less is known about its economic benefits. QUESTIONS/PURPOSES: We asked: (1) Are the societal benefits of hip fracture surgery enough to offset the direct medical costs? (2) Nationally, what are the total lifetime benefits of hip fracture surgery for a cohort of patients and to whom do these benefits accrue? METHODS: We estimated the effects of surgical treatment for displaced hip fractures through a Markov cohort analysis of patients 65 years and older. Assumptions were obtained from a systematic literature review, analysis of Medicare claims data, and clinical experts. We conducted a series sensitivity analyses to assess the effect of uncertainty in model parameters on our estimates. We compared costs for medical care, home modification, and long-term nursing home use for surgical and nonoperative treatment of hip fractures to estimate total societal savings. RESULTS: Estimated average lifetime societal benefits per patient exceeded the direct medical costs of hip fracture surgery by USD 65,000 to USD 68,000 for displaced hip fractures. With the exception of the assumption of nursing home use, the sensitivity analyses show that surgery produces positive net societal savings with significant deviations of 50% from the base model assumptions. For an 80-year-old patient, the breakeven point for the assumption on the percent of patients with hip fractures who would require long-term nursing home use with nonoperative treatment is 37% to 39%, compared with 24% for surgical patients. Nationally, we estimate that hip fracture surgery for the cohort of patients in 2009 yields lifetime societal savings of USD 16 billion in our base model, with benefits and direct costs of USD 21 billion and USD 5 billion, respectively. For an 80-year-old, societal benefits ranged from USD 2 billion to USD 32 billion, using our range of estimates for nursing home use among nonoperatively treated patients who are immobile after the fracture. CONCLUSIONS: Surgical treatment of hip fractures produces societal savings. Although the magnitude of these savings depends on model assumptions, the finding of societal savings is robust to a range of parameter values. LEVEL OF EVIDENCE: Level III, economic and decision analyses. See the Instructions for Authors for a complete description of levels of evidence.

Surgeons' knowledge about the costs of orthopaedic implants.

PURPOSE. To investigate consultant surgeons' knowledge about the costs of implants for various joint surgeries. METHODS. Questionnaires were distributed to consultant orthopaedic surgeons at 2 hospitals. Respondents were asked to estimate the implant costs of any brand for low-demand and high-demand total hip replacement (THR), total knee replacement (TKR), uni-compartmental knee replacement, arthroscopy shaver blade, total anterior cruciate ligament (ACL) fixation, and meniscal repair. The actual cost of each implant was obtained from the manufacturer. RESULTS. 16 consultant surgeons completed the questionnaires. The respective mean estimated and actual costs for a low-demand THR implant were £1714 (range, £600-3000) and £1448 (range, £985- 2335), with an overestimation of 18.4%. The respective costs for a high-demand THR implant were £2172 (range, £600-6000) and £1737 (range, £1192-2335), with an overestimation of 25%. The respective costs for a TKR implant were £1550 (range, £600-6000) and £1316 (range, £995-1535), with an overestimation of 17.8%. The respective costs for a uni-compartmental knee replacement implant were £1040 (range, £600-2000) and £1296 (range, £698-1470), with an underestimation of 19.7%. The respective costs for an arthroscopy shaver blade were £110 (range, £75-150) and £94 (range, £80-100), with an overestimation of 16.6%. The respective costs for a total ACL fixation implant were £246 (range, £80-500) and £306 (range, £272-335), with an underestimation of 19.4%. The respective costs for a meniscal repair implant were £153 (range, £50-250) and £242 (range, £170-260), with an underestimation of 37%. CONCLUSION. The knowledge among consultant orthopaedic surgeons about implant costs was poor. To reduce implant costs, cooperation between surgeons and hospital managers and measures to increase surgeons' awareness about cost-reduction programmes are needed.

Axillary view: arthritic glenohumeral anatomy and changes after ream and run.

BACKGROUND: The technique and results of shoulder arthroplasty are influenced by glenohumeral pathoanatomy. Although some authors advocate a routine preoperative CT scan to define this anatomy, ordering a CT scan substantially increases the cost and the radiation exposure for the patient. QUESTIONS/PURPOSES: We asked whether measurements of arthritic shoulders on a standardized axillary view are reliable; if postoperative radiographs can reliably show the changes in glenoid anatomy and glenohumeral relationships after shoulder arthroplasty, and if the axillary view can show differences in glenohumeral pathoanatomy in the different sexes and disease types. METHODS: These questions were addressed using cross-sectional studies of 344 shoulders with different types of arthritis and of 128 osteoarthritic shoulders having a ream and run arthroplasty (a glenohumeral arthroplasty that combines a noncemented humeral hemiarthroplasty with concentric reaming of the glenoid bone without implantation of a prosthetic glenoid component). Measurements of glenoid type, glenoid version, and glenohumeral contact were made on standardized axillary radiographs. Interobserver reliability was calculated, preoperative and postoperative measurements were compared, and morphologic differences were compared as stratified by sex and disease type. RESULTS: The measurements on axillary views showed a high degree of interobserver reliability and sensitivity to the changes effected by arthroplasty. The ream and run substantially corrected the glenoid type and point of glenohumeral contact. Male shoulders and shoulders with osteoarthritis had more type B glenoids (ie, those with posterior erosion and biconcavity of the glenoid), more retroversion, and a greater degree of posterior displacement of the point of glenohumeral contact. CONCLUSIONS: The axillary view provides a practical method of characterizing glenohumeral anatomy before and after surgery that is less costly and exposes the patient to less radiation than a CT scan. LEVEL OF EVIDENCE: Level IV, diagnostic study. See the Instructions for Authors for a complete description of levels of evidence.